/* 操作引导模态框 */
#guide-modal.guide-modal-overlay {
    position: fixed; top:0; left:0; right:0; bottom:0;
    background: rgba(0,0,0,0.5);
    display: none; align-items: center; justify-content: center;
    z-index: 10000;
}
#guide-modal.guide-modal-overlay.active {
    display: flex;
}
.guide-modal {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    width: 400px; max-width: 90%; padding: 20px;
    animation: guide-fadeIn 0.2s ease-out;
    font-family: "Segoe UI","Helvetica Neue",Arial,sans-serif;
    color: var(--text-color);
}
.guide-modal-header {
    display: flex; justify-content: space-between; align-items: center;
}
.guide-modal-close {
    background: transparent; border: none; font-size: 1.2em;
    cursor: pointer; 
    color: var(--text-color);
}
.guide-modal-body {
    margin-top: 10px;
}
.guide-modal-footer {
    margin-top: 20px; text-align: right;
}
.guide-btn {
    padding: 6px 12px; margin-left: 8px;
    border: none; border-radius: 6px; cursor: pointer;
}
.guide-prevBtn {
    background: #ccc;
}
.guide-nextBtn {
    background: var(--accent); color: #fff;
}
@keyframes guide-fadeIn {
    from { opacity:0; transform: translateY(-10px); }
    to   { opacity:1; transform: translateY(0); }
}